Kim, H.-C. Song, H.-C. Jeong, D.-Y. Kim, H.-J. Yoon, S.-J. Ju, B.-K. 2024-01-21T00:04:02Z 2024-01-21T00:04:02Z 2021-09-02 2007-12 1225-0562 https://pubs.kist.re.kr/handle/201004/133929 Piezoelectric energy harvesting from our surrounding vibration has been studied for driving the wireless sensor node. To change the vibration energy into the electric-energy efficiently, the natural frequency of cantilever needs to be adjusted to that of a vibration source. When adding 6.80g mass on the end of the fabricated cantilever, a natural fi-equency shifts from 136 Hz into 49.5 Hz. In addition, electro-mechanical coupling factor increased from 10.20% to 11.90% and resulted in the 1.18 times increase of maximum output power. Korean Frequency tuning of unimorph cantilever for piezoelectric energy harvesting Article 10.3740/MRSK.2007.17.12.660 1 Korean Journal of Materials Research, v.17, no.12, pp.660 - 663 Korean Journal of Materials Research 17 12 660 663 scopus kci ART001209930 2-s2.0-38049001927 Article Energy harvesting Frequency tuning Piezoelectric